multiplied by 20. From this vocabulary test can found the proportion of correct answer. Then, this study estimated
the number of student’s vocabulary mastery by multiplying it with the population 1000 words level. The formula was:
Note: S: the score of test
C: the total of right answer of vocabulary level test.
3.5.2 Reading Comprehension Test
There are 40 items for reading comprehension test. It was multiple choices with 5 options a, b, c, d, e with one correct answer and four distracters. There were five
reading skill, they were: determining main idea, identifying, specific information, inference, reference, and vocabulary. The scoring criterion is determined around
0-100. The formula was;
Note: S : the score of the test
r : the total of the right answer n : the total items
3.6 Criteria of Good Test
Test is a tool that contains a series of tasks that must be done or the questions that must be answered by learners to measure a certain behavioural aspects. Thus, the
function test is as a measuring tool. A test can be said to be good as a measure must meet the test requirements such as validity, reliability, level of difficulty,
discrimination power and scoring system. The description of the criteria of the tests
3.6.1 Validity of the Test
A test can be said valid if the test measure the object to be measured and suitable with the criteria Hatch and Farhady, 1982: 250. Every test whether it is a short
informal classroom test or a public examination test, it should be valid as the constructor can make it. The test used for collecting the data covers three
validities: content, construct and face validity. a. Content Validity
Content Validity is the extent to which the test measures a representative sample of the subject matter content. The focus of the content validity is
adequacy of the sample and not simply on the appearance of the test. Content validity is intended to know whether the test items are good
reflection of what will be covered. The test items are adapted from the materials Heaton, 1975: 60. To get the content validity, the items is
determined according to the material that given to the students.
